On the signature of cup anemometers’ opto-electronic output signal: Extraction based on Fourier analysis

Abstract The output signal of cup anemometers equipped with opto-electronic output signal generators (such as Vector Instruments A100 LK or Thies First Class Advanced) is analyzed to extract the signature of the anemometer. This signature is a unique information for each single anemometer whose output signal is a train of square-pulses. This signature reflects errors introduced within the fabrication process of the slotted wheels from the opto-electronic output signal generator. The signature of a cup anemometer can be used to filter the output signal, increasing the accuracy of the wind sensor.